Aptitude - Volume and Surface Area - Discussion
Discussion Forum : Volume and Surface Area - General Questions (Q.No. 12)
12.
A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:
Answer: Option
Explanation:
Let the thickness of the bottom be x cm.
Then, [(330 - 10) x (260 - 10) x (110 - x)] = 8000 x 1000
320 x 250 x (110 - x) = 8000 x 1000
| (110 - x) = |
8000 x 1000 | = 100 |
| 320 x 250 |
x = 10 cm = 1 dm.
Discussion:
49 comments Page 4 of 5.
Sarwesh Alshi said:
1 decade ago
Why not 2x? They wrote here only as x.
Mani said:
1 decade ago
I can't understand please tell me brief.
Mahesh said:
1 decade ago
Why we are subtracting 10? Please tell any one.
Suriya said:
1 decade ago
Hello sir if you want to find thickness of bottom. Why subtract 10 from the height instead of breath?
Tejaswini said:
1 decade ago
dm in the sense diameter 10cm = 1dm.
Tejas said:
1 decade ago
What is 1 dm?
Sharma said:
1 decade ago
It's clearly given that thickness of the wall is 5cm.
Bottom part is not a wall, it is unknown, So consider X.
Thank You !
Bottom part is not a wall, it is unknown, So consider X.
Thank You !
Deepak said:
1 decade ago
Why length and breadth?
Why not just breadth and considering its radius?
Why not just breadth and considering its radius?
Ujwala said:
1 decade ago
Why to subtract thickness of both sides?
Sahi said:
1 decade ago
Volume is given in litres so we convert it into cubic cm by multiplying
it by 1000(because 1 liter = 1000 cubic cm).
it by 1000(because 1 liter = 1000 cubic cm).
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